http://localhost:8080/handle/123456789/2753 Sat, 18 Apr 2026 21:04:12 GMT 2026-04-18T21:04:12Z http://localhost:8080/handle/123456789/1243 EFFECT OF A SEED TREATING CHEMICAL AND THREE PLANT EXTRACTS ON THE MANAGEMENT OF APHID AND SAWFLY INFESTING MUSTARD IN RELATION TO SOWIMG TIME ALAM, MD. TOFAYEL The experiment was conducted to study the effect of a seed treating chemical and three plant extracts on management of Aphid and Sawfly infesting mustard in relation to sowing time in the field of Sher-e-Bangla Agricultural University farm, Sher-e-Bangla Nagar, Dhaka, Bangladesh during the period from November 2008 to March 2009. In these study the environmental factors were evaluated at three time e.g.23 November, 30 November and 06 December, 2008. The experiment comprised of the following treatments; T1: Confider 70WG @ 3 g/kg seeds; T2: Zinger extract @ 20 ml/L water at 7 days interval; T3: Turmeric extract @ 20 ml/L water at 7 days interval; T4: Neem leaf extract 20 ml/L water at 7 days interval and T5: Control. Three experiments were laid out in three sowing times. Each experiment was set in a Randomized Complete Block Design (RCBD) with three replications. For sowing on 23 November 2008, the lowest number of aphid and sawfly was recorded from T4, while the highest number obtain from T5 treated plots at early, mid and late flowering and fruiting stages. The seed yield per hectare was recorded highest from T4 (2.34 t/ha), while the lowest from T5 (2.01 t/ha) treated plots. Sowing on 30 November, 2008 showed the lowest number of aphid and sawfly in T4, while the highest number from T5 treated plots at early, mid and late flowering and fruiting stages. The highest yield was obtained from T4 (2.64 t/ha), while the lowest yield was recorded from T5 (2.02 t/ha) applied plots. Mustard sown on 06 December, 2008 the lowest number of aphid and sawfly in T4, while the highest number in T5 treated plots at early, mid and late flowering and fruiting stages. The highest yield was recorded from T4 (2.21 t/ha) and the lowest yield from T5 (1.95 t/ha) applied plots. A Thesis Submitted to the Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka-1207 in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE IN ENTOMOLOGY SEMESTER: JULY-DECEMBER’09 Tue, 01 Dec 2009 00:00:00 GMT http://localhost:8080/handle/123456789/1243 2009-12-01T00:00:00Z http://localhost:8080/handle/123456789/1242 EFFECT OF DIFFERENT APPLICATION METHODS OF IMIDACLOPRID ON ABUNDANCE AND MANAGEMENT OF JASSID IN OKRA ZAMAN, MD. YASIR A field study was carried out in the farm of Sher-e-Bangla Agricultural University during May to June, 2009 to investigate the effect of different application methods of imidacloprid on abundance and management of jassid in okra. The population of jassid was gradually increased with the age of the crop and the peak population was found on last week of May and it was remained constant after that. The lowest number of jassid (16.47/plant) was found in T2 (seed treatment by Gauchu 70WS + foliar spray with Admire 200SL), which reduced 77.71% population of jassid over control. Plant height, number of fruits/plot and yield per plot were significantly increased under different treatments. The highest plant height (244.8 cm), number of fruits/plant (652) and yield (13.84 t/ha) were observed in T2 (seed treatment by Gauchu 70WS + foliar spray with Admire 200SL) treated plot. The result of T4 (seed treatment by Gauchu 70WS + band application of Gauchu 70WS) and T5 (pre-plant injection by Gauchu 70WS at a depth of 4cm below the seed line + foliar spray with Admire 200SL) were statistically similar with T2 (seed treatment by Gauchu 70WS + foliar spray with Admire 200SL) treated plot. The highest benefit cost-ratio (BCR) was obtained in T1 (23.22) and the highest adjusted net return (Tk. 41,300) was obtained in T2 which was found as the best treatment in this study. Considering jassid population, plant growth, number of fruits and fruit yield, T2 (seed treatment by Gauchu 70WS + foliar spray with Admire 200SL) was the most effective application methods. A Thesis Submitted to the Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE IN ENTOMOLOGY SEMESTER: JULY-DECEMBER, 2009 Tue, 01 Dec 2009 00:00:00 GMT http://localhost:8080/handle/123456789/1242 2009-12-01T00:00:00Z http://localhost:8080/handle/123456789/1241 MAJOR INSECT PESTS OF COWPEA (Vigna unguiculata L. Walp.) AND THEIR MANAGEMENT PRACTICES NURUNNABI, MD. A field study was carried out in the farm of Sher-e-Bangla Agricultural University, during March to June, 2009 to investigate the major insect pests of cowpea (Vigna unguiculata) and to explore the suitable practice(s) for their management. Among the treated plots, the lowest incidences of bean aphid and jassid were observed in T1 (Neem oil treated plot @ 3 ml/L of water) at different days after sowing whereas the higher incidences was found in T6 ( Furadan 5G @ 5 g/Plot.) For management of thrips and pod borer, T1 (Neem oil @ 3 ml/L of water) as well as T2 (NSKE @ 5 ml/L of water) demonstrated the highest performance whereas T5 (Dursban 20EC @ 2 ml/L of water) showed the lowest performance under the present study. Yield and yield performance against different insect pests were significantly influenced by different treatments. Highest number of healthy pods (480.33)/4m2 was obtained in T1 (Neem oil treated plot) where the lowest (263.67)/4m2 in T5 ( Dursban 20 EC treated plot). The highest percent of pods weight (78.32%) was obtained with T1 (Neem oil treated plot) treatment while the lowest percent of pods weight (69.21%) was obtained with T4 (Marshal 20 EC treated plot) considering percent infestation of pods by number and weight A Thesis Submitted to the Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka, in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE IN ENTOMOLOGY SEMESTER: JULY-DECEMBER, 2009 Tue, 01 Dec 2009 00:00:00 GMT http://localhost:8080/handle/123456789/1241 2009-12-01T00:00:00Z http://localhost:8080/handle/123456789/1240 EFFECT OF SOME BOTANICALS ON MORTALITY, ADULT LONGEVITY AND OVIPOSITION OF PULSE BEETLE ON MUNGBEAN LAIZU, MST. The experiments were conducted in the laboratory under the Department of Entomology, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from May, 2009 to September, 2009 to evaluate the effectiveness of botanicals against the pulse beetle (Callosobruchus chinensis) in mungbean. Considering the effectiveness of different botanicals for the management of C. chinensis infesting mungbean seeds, the treatment T7, T8 and T9 comprising Bankolmi, Dhatura and Korobi leaf powder respectively @ 1g/50g seeds performed the best results in respect of adult mortality, oviposition rate, adult emergence, damaged seed and weight loss over control for the species. Considering the highest percent mortality (20%) in treatment T1 and treatment T10 untreated control showed the lowest mortality percent (5%). The lowest rate of oviposition (30.50) was recorded from T7 and T8, while the highest rate of oviposition (48.00) was recorded in T3. The lowest number of adult emergence was recorded from T7 treatment, while the highest number of adult emergence (551.3) was recorded in T3. The lowest percent grain infestation by number (15%) was recoded from T7 & T2 treatments, while the highest percent grain infestation by number (28.75%) was recorded in T3. The lowest percent weight loss was recorded from T7 treatment, while the highest percent weight loss was recorded in T3. Considering the weight of pulse beetle, the lowest weight (13.13 mg) of pulse beetle was recoded from the treatment T6 and the highest weight (18.17 mg) of pulse beetle were recorded from untreated control. Considering the effectiveness of botanicals on the offspring of treated C. chinensis the highest mortality percent (10%) was recoded from the treatment T7, T8 and T9 and the lowest mortality percent (2.5%) was recorded from untreated control. The lowest rate of oviposition (8.75) was recorded from T8 and while the highest rate of oviposition (14) was untreated control. The lowest number of adult emergence (44.75) was recorded from T3 treatment, while the highest number of adult emergence (88.75) was recorded from untreated control. The lowest percent grain infestation by number (1.25%) was recoded from T7 treatment followed by T8 and T3, T1, T9 treatments respectively, while the highest percent damage by number (10%) was recorded from untreated control. The lowest percent weight loss (0.80%) was recorded from T3 treatment, while the highest percent weight loss was recorded from untreated control. A thesis Submitted to the Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka In partial fulfillment of the requirements For the degree of MASTER OF SCIENCE IN ENTOMOLOGY SEMESTER: JULY- DECEMBER 2009 Tue, 01 Dec 2009 00:00:00 GMT http://localhost:8080/handle/123456789/1240 2009-12-01T00:00:00Z